Self-setting head and tail block of sawmills



UNITED STATES PATENT OFFICE.

JOS. J. PARKER, OF PLYMOUTH, OHIO.

SELF-SETTING HEAD AND TAIL BLOCK OF SAV/'MILLS T0 all wit-om t mayconcern Be it known that I, Josnrrr J. PARKER, of Plymouth, in thecounty of Washington and State of Ohio, have invented a new and usefulImprovement in Self-Setting Head and Tail Blocks for Sawmills, which isdescribed as follows, reference being had to the annexed drawings of thesame, making a part of this speciiication.

Figure 1 is a top view of the head and tail blocks, together with thecarriage; showing also the self acting holdfast. Fig. 2 is a verticallongitudinalisection through the center of the self settingapparatus ofthe tailblock,

drawn at the dotted line ai, of Fig. 1Q

Fig. 3 is a vertical transverse section of the same drawn at the dottedlinelO, 10, ot Fig.

. 1. Fig. 4. is a vertical longitudinal section through the self settingapparatus of the head block drawn at the dotted line 8, S of Fig. 1.Fig. 5 is avertical transverse section of the same, drawn at the dottedline 9, 9, of

Fig. 1. Fig. 6 is a view of the underside of the head and tail blocksand carriage turned bottom upward. Fig. 7 is a plan or top view of thefloor of thesaw mill, upon which are seen the flat sills or streainers,with the `inclined wedges, &c.,"by` which the setting apparatus are setin vmotion by coming in contact with the same, as the carriage moves.Fig. 8 represents a side and top view of the slide of the tail block.Fig. 9 shows a front view of the hold fast. Fig. 10 is anothermodification of the tail block showing an inverted V shaped plate forstraddling the slide C to prevent slipping and to do away with thenotched plates. y

A in Figs. 1 and 3 represents the permanent part of the tail block, madewithout the usual rabbeted bearing, the latter being made movable andcalled the slide block.7 B, a

`horizontal bearer fastened to the carriage in front of the permanenttailblock leaving a suiiicientspace between the bearer and block toadmit of the free motion of the slide D.

C represents the slide for raising against the slideblock (with the logthereon) and moving it toward the saw, by runnin in contact with theinclined wedge 7 of Fig. l as hereafer described. Said slide has threesets of saw like teeth placed crosswise for holding. It consists of arectangular bar of timber, flat on the upper side which comes in contactwith the slide block, and having formed on the underside an obliqueinclined Specification of Letters Patent No. 3,629, dated June 13, 1844.

shoulder S as represented in Fig. 2, against which shoulder= theinclined and beveled edge oft' the inclined wedge W comes in contact forsliding it toward the saw, and having a notch or mortise in the frontside ot it near the end into which is inserted the end of a spring Gfastened to the top oit the carriage, which throws back the said slide;after having performed its lateral movement and set over the slideblockwith the log'thereon. As the carriage advances toward the saw whilecutting the log, the spring G presses the oblique inclined shoulder ofthe slide against the inclined beveled edge of the inclined wedge WV,when by the time the said slide passes said inclined wedge the slide isbrought to its former position ready for a new or another set. On theunderside of the permanent tail block is a sliding gage g fordetermining the thickness of the boards to be sawed, having a wedgeshaped end passing under the slide C, against the beveled edge of whichslidinggage a shoulder on the underside of the slide strikes, said Aslide moving horizontally and liatwise against the underside of the tailblock, and between the tail block and cross timber ot the carriage andsecured there by means ot a wedge or screw or any convenient manner. Byadvancing the wedge shaped end of the gage between the carriage timberand shouldertormed on the underside and near the end of said slide, thethrow or movement of the slide is diminished, by withdrawing the gagethe distance of movement is increased, thereby increasing the thicknessof the board.

` D represents in Fig. 2 the slide block rabbeted in the form of a rightangle or like a common headblock, made movable. This slideblock isplaced upon thebearers B, (b) Fig. 3, and over the slide C, andimmediately in front of the permanent tailblock. It is held downsecurely by the holdtast7 M when its weighted arm or lever O is down,and loosed or liberated when said arm or lever is raised. The end of thelog rests upon this rabbeted slide block. Immediately behind the slide Cand fastened to the front of the permanent tail block is a short bearer(o) upon which the posterior part of the slide block D rests-'See Fig.3.

E represents in Figs. l and 7 the flat sill placed on the floor of themill, and fastened permanently there, upon which the inclined l wedgeshaped way is placed. In said sill there are holes -orapertures forreceiving dowel pins a, a on the underside of the wedge shaped inclinedway `W, as represented in Fig/3, for adjusting said way to the length ofthe log to be sawed.

1W represents in Fig. l the aforesaid inclined wedge shaped way,havingits upper and inclined edge sloped or beveled, against Vwhichslope .or bevel, the oblique inclined` shoulder S on the underside ofthe slide C comes 'int contact in running the carriage back which causesa lateral movement ofthe slide On the underside of the way are dowelpins a, a, asshown in Fig. 3 which are received by'corresponding holesor apertures in the flat sill E.

Fl as shown in Fig. 6 is a rectangular shaped bar of timber fastenedtransversely on .the .underside of the cross timber of the-` carriage,beneath the. tailblock, extending forward under the bearer B andbeinglet into said=bearer so as to prevent a lateral movement of said bar Fof timber. Said cross bar F'has a groove on its uppersurfacecorresponding tothe aperture or space between the. two bearers Bl) in which the` slide C moves back and forth, said cross timber or barFpasses'along the straight side w m of thebefore described way WV (Fig.l) and prevents-'the carriage from being ..pressed sideways, by theaction of the shoulder on the. underside of vtheslide C against the.inclinedfedge of the way WV.

.G as shown inFig. `Il, represents the spring for` holding .theshouldered part c c of the slideC against thel sliding. gage. g. so.that as actingfuponHthe slide, which .produces the.

simultaneous .vertical and lateral movement of' thelslide` C togetherwith the slideblock andvlogv thereon.I i

I .of Fig. 9 represents aneccentric on the` endyoffan axlev J .see Figs.l and 9 *passing*` through4 the vtail block. secured to. the tailblock-; vhaving aweighted .lever @,onv the opposite end of said axle,for bearing Vthe.

holdfastrhard .down uponY the sliding: block. forzholdingit fastandsteady, while. the saw y 1s passing' through the log ;--vvithout thiseccentric andlever, the .motion of the mill would so agitate the slideblock with theA log,

thereonxas-to endanger. the breaking,I of the saw.l

Q1: is aA hinged .block for lifting.. said.-

weighted lever for liberating the holdfast A from the slide block, whichtrips and turns on' its points, and passes over the wedged shaped wayl/V as the carriage advances toward the saw without moving the lever andwhich on running back the carriage or jigging back;y as fit is termed,assumes a straight vertical line, in passing around the inclined vwedgeshaped block, or way, WV, causing the lever to rise, and turn theeccentric, and thus remove the pressure from the slide block.

M in Figsnl, 2, 3, 9 represents the hold fast having on its anterior andsuperior part a shoulder, which fastens upon the slide block. lVhen theweighted lever orI arm is down, it has also a niortise through itscenter in which the eccentric is situate and operates.

The operation of the foregoing described tail block is as follows, asthe carriage. isl run orjigged black, the hinge block@J sus-j pendedfrom the .lever O, comes in Contact with thev inclined edge of the wedgevshaped way lV which presses or `gives, ita lateralv movement, therebyraising the lever, andtiirns the eccentric, suiiicient to raise theholdfast from the slide block, thereby liberatingit from the pressure ofthe holdfast,

as the carriage. passes on; theobli'que inclined shoulder s of the slidecomes in con: tact with the sloped o-r beveled'edge Vof the wedge shapedwaylV, and yby the action ofthereon is effected, making the set completewhen theaforesaid shoulder s of the slide arrives atvthe. straight partofy thewedge shaped way-at which time the hinged block suspended fromthelever O passes'over therA wedged shaped way lVand lets theweightedlever fall and fasten the. slide. block. Then .as the carriagemoves forward toward the saw, the hinge block trips and turns .on itsjoint and passes over the way lV. without raisingthe lever.

A2 of Fig.` l vrepresent-s the head block. rabbetedor .made in the usualform.

C2 of Figs. 1, 4,5, 6 represents the slide, which .is placed in front/of.theheadblock It is made in .t-wo'parts and yconnected by ai yoke vP Vorotherwise, so asto'leave a space between them for the saw. to retreat..into

vthe/*groove in. the. headblock,l the .outer end of each halfof theslide being halved `where i they move -laterally Aback and `fort-h over'the sides-H, of t-he carriage; the inner ends, neXtfto thesaw aresuspended yloytenonsfl. Figs. l and 5 fastened to theunder side oftheheadfblock, said tenons, passing through` oblongmortises, made. inVthe slide of greater length and depththan^the thickness ofsaidv tenons,`so vas to allow; said. .slide to havea corresponding, vertical andhorizontal movement, and moving laterally the log toward the saw to bepresently described. VSaid slide is held against the head block by meansof shoulders on the afo-resaid tenons. Said slide is drawn back to anyrequired distance for a set, as the carriage is running back by ashoulder formed on the under side of one-half of said slide coming inContact With a Wedge shaped block fw, Figs. 7 and 8, said block beingfastened to the floor of the mill at one end by means of a bo-lt orscrew or otherwise, the other end being movable so as to regulate theset, by movin` it to the right or left, and maintaining it in itsrequired position by means of a pin 79 placedin the floor. Said slideafter being drawn over the required dis tance as aforesaid is raised byrunning up inclined planes 7c, 762, one of which is connected with theaforesaid Wedge block lw, which liberates the shoulder of said slidefrom the Wedge block w. The teeth s, s, beingpressed into the log it iscarried over by the action of a spring Y Fig. 6 against a shoulder onsaid slide. Y

s s of F ig. 4 represents a plate fastenedto the aforesaid slide C2having its upper edge notched in the form of saw teeth, to prevent theslide from slipping` underthe log While in the act of setting.

Y as shown in Fig. 6, is a metallic spring, made of suflicient strengthfor throwing or moving the slide laterally with the log thereon.

X4 is an inverted V-shaped iron which straddles the slide and supersedesthe use of the notched plates.

I disclaim all invention to the individual parts before described. But

What I do claim as my invention, and desire to secure by Letters Patentisl. The manner herein described and set forth in which I have arrangedthe movable parts of the tail block and combined them with t-he carriageso that by the oblique inclined shoulder S of the setting slide C, andthe spring G, in combination with the sloped or beveled edge of theWedge shaped Way lV (by which the slide C is raised and made fastagainst the slide block D) a horizontal lateral and vertical compoundaction is produced the pressure lof t-he slide block D, iviththe log`thereon, upon the permanent bearers B, b, being diminished, and thelateral movement of the log toward the saw effected in the manner andfor the purposes set forth.

2. I also claim the manner of set-ting the end of the log` resting onthe head block, by the combination, and arrangement of the divided slideC2 connected by the connecting yoke P and the shoulder on the under sideof the slide C2 and spring Y in conjunction with the wedge shaped blockw, and inclined planes 7c, /02 for the purposes set forth.

JOSEPH J. PARKER. Vlitnesses JACOB L. MYERS, JOB S. KING.

